// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_
#define UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_

#include <string>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/strings/string16.h"
#include "ui/views/controls/button/label_button.h"

namespace views {

// A native themed class representing a checkbox.  This class does not use
// platform specific objects to replicate the native platforms looks and feel.
class VIEWS_EXPORT Checkbox : public LabelButton {
public:
    static const char kViewClassName[];

    explicit Checkbox(const base::string16& label);
    ~Checkbox() override;

    // Sets a listener for this checkbox. Checkboxes aren't required to have them
    // since their state can be read independently of them being toggled.
    void set_listener(ButtonListener* listener) { listener_ = listener; }

    // Sets/Gets whether or not the checkbox is checked.
    virtual void SetChecked(bool checked);
    bool checked() const { return checked_; }

protected:
    // Overridden from LabelButton:
    void Layout() override;
    const char* GetClassName() const override;
    void GetAccessibleState(ui::AXViewState* state) override;
    void OnFocus() override;
    void OnBlur() override;
    const gfx::ImageSkia& GetImage(ButtonState for_state) override;

    // Set the image shown for each button state depending on whether it is
    // [checked] or [focused].
    void SetCustomImage(bool checked,
        bool focused,
        ButtonState for_state,
        const gfx::ImageSkia& image);

private:
    // Overridden from Button:
    void NotifyClick(const ui::Event& event) override;

    ui::NativeTheme::Part GetThemePart() const override;
    void GetExtraParams(ui::NativeTheme::ExtraParams* params) const override;

    // True if the checkbox is checked.
    bool checked_;

    // The images for each button state.
    gfx::ImageSkia images_[2][2][STATE_COUNT];

    DISALLOW_COPY_AND_ASSIGN(Checkbox);
};

} // namespace views

#endif // UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_
